You'll go loony with delight when viewing the lunar surface with the help of our affordable Moon Madness Kit. This value-packed assortment of useful accessories lets you get the most out of each and every view of Earth's only natural satellite.

When installed on a 1.25" telescope eyepiece, the included Orion 13% Transmission Moon Filter will bring out considerably more lunar surface details thanks to the boosted contrast. Not only will more surface features and details pop out, but you can study them in greater comfort, thanks to Moon Filter reducing overall brightness without altering color. This neutral-density telescope eyepiece filter reduces irradiation, which is the distortion at the boundary between light and dark areas, such as along the lunar terminator. Using a Moon filter also helps conserve dark-adapted vision while viewing the lunar surface, especially when using big telescopes with 6" of aperture and larger.

A twist of the housing of the included 7-21mm Orion Explorer II Zoom Telescope Eyepiece changes the focal length from 21mm to 7mm, or to any focal length in between. That makes it ideal for scanning the entire Moon at low magnification, then zooming in at higher magnifications for closer inspection of cratered areas - without changing eyepieces! Actual magnification range will depend on the focal length of your telescope. This four-lens telescope eyepiece boasts fully coated optics and exceptionally long eye relief ranging from 33mm to 16mm for comfortable views. Apparent field of view is 30° at 21mm and 43° at 7mm. A rubber traction ring ensures a good grip and easy zoom adjustment. The 1.25" barrel is threaded for filters, so you can install the Moon Filter for great lunar views .

The included high-power 6.3mm Sirius Plossl telescope eyepiece offers a wide 52° apparent field of view, ideal for high-magnification Moon viewing. The 6.3mm Orion Sirius Plossl Telescope Eyepiece yields extremely sharp scenes with impressively high contrast, and it's ideal for all types of telescopes: reflector, refractor, and catadioptric. The Plossl 4-element eyepiece design is renowned for its outstanding performance, and is threaded for use with 1.25" filters such as the included Moon Filter.

The included Orion MoonMap 260 is a useful reference map of the Moon's surface that will help the whole family learn the names and locations of more than 260 craters, mountains, valleys, "seas" and other interesting lunar features you can explore with your telescope. Use the MoonMap 260 to identify craters you've observed, or use it before you go out with a telescope to plan a night full of Moon-watching family fun.

Put on the included Orion AstroGoggles and wear them for a half-hour or so before you use your telescope to help your eyes adapt to the darkness of the night sky.

Warranty

Limited Warranty against defects in materials or workmanship for one year from date of purchase. This warranty is for the benefit of the original retail purchaser only. For complete warranty details contact us at 800-676-1343.

Design

Different eyepiece designs allow for a wide range of features, depending on the needs of the observer. Orthoscopic and Plossl designs can provide a great quality image with a standard field of view, but may be difficult to use at higher powers while wearing glasses due to the short eye-relief. Long eye-relief designs have more elements and can be more expensive, but work very well with glasses, even at higher powers. Wide angle designs provide a larger view of the sky at the same power as a standard eyepiece. More complex designs can combine all these attributes together in a single eyepiece.

Apparent field of view

The edge-to-edge angular diameter of the light emerging from the eyepiece as seen by the eye. It is an inherent specification for a given eyepiece type or design. The apparent field of view of an eyepiece is directly related to the true field of view seen through the telescope; for a given focal length eyepiece, the greater the eyepiece's apparent field of view, the greater area of sky will be seen.

Eye relief

The distance, measured in millimeters, between the observer's eye and the eyepiece lens in which the entire field of view remains visible. Eye relief varies with the optical design but generally increases with decreasing magnification. Long eye relief is advantageous for observers who wear glasses, as they don't have to put their eye directly on the eyepiece to see the entire field of view, nor do they have to remove their eyewear.

Coatings

Lenses are coated with an antireflective material to ensure that as little light as possible is reflected away, so more gets to your eye. Good lenses are at least "fully coated," with a single layer of magnesium fluoride applied to each air-to-glass lens surface. Multiple layers of coatings are even more effective; the term "multi-coated" means one or more lens surfaces have multiple coatings. "Fully multi-coated" is even better, meaning that all lens surfaces are multiple-layer coated.
Mirror star diagonals are coated with a reflective material similar to telescope mirrors in order to reflect the light into the eyepiece. Standard aluminum coatings reflect between 88%-92%, and enhanced aluminum reflects 97%.
Dielectric coatings use a different process to deposit a coating that reflects 99% of the light. In addition to the higher reflectivity, Dielectric coatings are much more durable than aluminum coatings, so they last longer and can be cleaned with less risk of damage.

Parfocal

Barrel security recess

The barrel security recess is a shallow groove or depression cut into the 1.25" or 2" barrel of the eyepiece. In the event the thumb screw holding the eyepiece in the focuser becomes slightly loose, the eyepiece will not fall out because the tip of the thumb screw will catch on the lip of the security groove.

Warranty

This warranty gives you specific legal rights. It is not intended to remove or restrict your other legal rights under applicable local consumer law; your state or national statutory consumer rights governing the sale of consumer goods remain fully applicable.

Orders received by 1pm Eastern Time for in-stock items ship the same business day. Orders received after 1pm will ship the next business day. When an item is not in-stock we will ship it as soon as it becomes available. Typically in-stock items will ship first and backordered items will follow as soon as they are available. You have the option in check out to request that your order ship complete, if you'd prefer.

A complete assortment of accessories for your telescope, the Orion Premium Telescope Accessory Kit comes with five Sirius eyepieces, a Shorty Barlow, and six filters for lunar and planetary observing, and a case. Everything you need, all in one kit!

Need for a good way to start identifying constellations? The Orion Star Target Planisphere is the perfect telescope accessory! Designed for 30-50 deg North latitude and includes simple instructions and viewing tips. Just dial in the date and time!

A wonderful tour of the constellations, Discover the Stars is a good companion for beginning stargazers. Includes 12 all sky charts showing the night sky each month, and 23 more detailed charts showing interesting objects within each constellation.

At Orion, we are committed to sharing our knowledge and passion for astronomy and astrophotography with the amateur astronomy community. Visit the Orion Community Center for in-depth information on telescopes, binoculars, and astrophotography. You can find astrophotography "how to" tips and share your best astronomy pictures here. Submit astronomy articles, events, and reviews, and even become a featured Orion customer!